Re: [PATCH 0/5] create GDB/MI commands using python

[Simon Marchi <simon.marchi@polymtl.ca>]

>  3. The top level result name can be changed from 'result' to anything
>     the user wants, here's an example session:
> 
>     (gdb) python
>     >class MyCommand(gdb.MICommand):
>     >  def __init__(self):
>     >    super(MyCommand, self).__init__("-my-command", "greeting")
>     >  def invoke(self, args):
>     >    return "Hello World"
>     >
>     >end
>     (gdb) python cmd = MyCommand()
>     (gdb) interpreter-exec mi "-my-command"
>     ^done,greeting="Hello World"
>     (gdb)

I find this a bit surprising, why is "greeting" passed to the
constructor?  Since an MI result, at the root, is basically a dict,
my intuition would be to only allow the invoke method to return a dict.

  def invoke(self, args):
      return {'a': 1, 'b': "hello"}

which would result int:

  ^done,a="1",b="hello"

Returning None (which is returned if there's no explicit "return") would
also be allowed, in which case there is not result:

  ^done

Simon